We report the preparation of homogeneous, polycrystalline
MgB2 films on single-crystalline MgO substrates by screen printing and airbrush methods. The superconducting material
was obtained by the reaction of Mg vapor with boron precursor layers in special steel casings under Argonon/hydrogen atmosphere at 800 ◦C and ambient pressure. After polishing of the surface, films with a thickness of about 2 μm were obtained. Electrolytic polishing improved the surface smoothness of the samples. Transition temperatures of about 33 K were measured with irreversibility fields of up to 6 T at 20 K. Transport critical current densities of 2×109 Am−2 were obtained at 4.2 K in self-field for a MgB2 film on single-crystalline MgO.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
We report the preparation of homogeneous, polycrystalline
MgB2 films on single-crystalline MgO substrates by screen printing and airbrush methods. The superconducting material
was obtained by the reaction of Mg vapor with boron precursor layers in special steel casings under Argonon/hydrogen atmosphere at 800 ◦C and ambient pressure. After polishing of the surface, films with a thickness of about 2 μm were obtained. Electrolytic polishing improved the surface smoothness of the samples. Transition temperatures of about 33 K were measured with irreversibility fields of up to 6 T at 20 K. Transport critical current densities of 2×109 Am−2 were obtained at 4.2 K in self-field for a MgB2 film on single-crystalline MgO.
Journal:
Applied Physics A
Volume:
80
Seitenreferenz:
127-129
Erscheinungsjahr:
2005
ISSN:
1432-0630
Anzahl der Seiten:
-2
Notiz zur Publikation:
Superconducting MgB2 films on MgO substrates
M. Kühberger, G. Gritzner, R. Fuger, M. Eisterer, S. Tönies and H.W. Weber
Appl. Phys. A, 80 (2005) 127 - 129
Forschungs-